Timber connecter



Aug. 31, 1926. 1,598,199

J. JOHANSSON ET AL TIMBER CONNECTER Filed Sept. 21, 1922 Patented Aug.31, 1926.

UNITEDSTATES moon JOHANSSON Annmari soLBERe, or CHRISTIANIA, NORWAY.

TIMBER CONNECTER.

. Application filed September 21, 1922, Serial No. 589,688, and inNorway October 31', 1921.

This invention relates to spike connecters for connecting timber and thelike of the type in which metal plates or ribbons are provided withteeth or spikes which penetrate into the wood, said teeth or spikesbeing parallel to the said plate or ribbon.

The object of the invention 1s to produce a metal spike connecter which'w1ll be cheap and simple-to use and which will have the sameholdingpower in all directions irrespectivc of the acting forces or thedirection of the fibres of the timber or the like.

It has been proposed in connecters of the above type to provide teeth onone side only of the connecter in which case they could only be driveninto the wood in such a manner that the driving end was always leftexposed. 7

According to the present invention connecters of the type are providedwith teeth or spikes on two opposite edges.

The teeth or spikes of the connecters are bulged or grooved in such away that they exert great holding power even in the case when they areplaced with their sides parallel to the fibres of the wood, whereastheir teeth placed across the fibres will damage the wood as little aspossible. Furthermore the manner of production of these connectingplates makes it possible to make the spikes long and sharp, so that theyare easily forced into the wood, even if this is comparatively hard.Connecting plates of this'type can be made in all necessary sizes, sothattheyoan be used for all kinds of connections of planks or heavytimber, where the greatest stresses are met. Con cerning resistanceagainst bending and shearing stresses the bulgedteeth or spikes resemblethose madefrom cast or malleable lIOIl.

1n the process of manufacture the teeth or spikes are cut or stamped outof the metal plate or ribbon and then bulged or grooved as explainedabove after which the spiked. ribbon is bent to the shape most suitablefor its special purpose. The form preferably used in generalconstruction is that 'of a ctliosed ring but any other form may be useThe invention is shown in the accompany ing drawings, in which Fig. 1 isa spike connecter, and

Fig. 2 is a side view of the same.

plan view of the improved Referring now, more particularly to thedrawings, the connecter 1 is preferably stamped from a strip of metaland includes a ribbon-like. body portion 1 preferably though notnecessarily of annular configuration in plan, formed with a-series ofuniformly spaced integral teeth 2. These "teeth project at equaldistances from opposite edges of the body portion 1 and are curvedtransversely or bulged outwardly as at 3 s o as to be reinforced, therespective ends be ng pointed as at 4 and the pointed ends beingarranged in the middle of the single strengthening bulge as shown inFig. 1. i

In use, this connecter is adapted-to be arranged edgewise between thesides of timbers or planks and enters one-half of its height or widthinto each timber, thus actmg as strong spikes or taps, passing directlyfrom one wooden part into the other. It will thus be seen that thewooden parts bear solidly against one another without any interveningmember.

Having thus fully described the invention what is claimed as new anddesired to be secured by Letters Patent is 1. A spike connecterincluding a ribbonlike annular body and a series of uniformly spacedteeth integral with and projecting equal distances from opposite edgesof the body and bulged outwardly, and the respective ends of the teethbeing pointed and the pointed ends arranged in the middle of the single.strengthening bulge.

2 A spike oonnecter of the character de scribed stamped from a singlestrip of metal and including a ribbon-like bod of annular configurationin plan, a plurality of-uniforrnly spaced teeth integral with andproectmg at equal distances from the opposite ill) marginal edges of thebody portion, the.

teeth being curved. transversely throughout the length and pointed atthe respective ends in such manner that the points lie medially of thecurved portions and in alignment with an imaginary straight line drawnthrough the medial portion thereof, substantially as and for thepurposes setforth.

' In testimony whereof we have signed our names to this specification. 1

' JAG. JOHANSSON.

LEIF SOLBERG.

